The contest between John Fetterman and his Republican rival Mehmet Oz had been among the most high-profile contests of the election
With twists and turns in a campaign that involved everything from claims over puppy-killing to questions over the Democratic candidate's health.
Fetterman had a strong lead earlier in the campaign, but suffered a stroke in May.
He stayed out of the public eye for months afterwards
Instead relying on television adverts and an aggressively snarky social media campaign to build a polling lead over his opponent
In October, a report that the Republican had conducted experiments involving puppies spawned social media memes.
But Fetterman's reluctance to take part in televised interviews led to questions over his health and fitness to serve as a senator
He appeared to have been reflected in the polls that tightened dramatically in the last days of the race.
Despite the difficulties, Fetterman came out on top.
John Karl Fetterman is an American politician who is the U.S. senator-elect from Pennsylvania. Fetterman had a strong lead earlier in the campaign, but suffered a stroke in May.